"Igneous intrusive bedrock. Occurs onshore. Emplaced during the Paleogene Period (66-23.04 Ma BP)."@en . . "Centre 1 Cone-Sheet-Swarm"@en . "66.0"^^ . "23.04"^^ . "Centre 1 Cone-Sheet-Swarm"@en . . . . . "stable"@en . . "C1"@en . .